Journal
FRONTIERS IN PLANT SCIENCE
Volume 11, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2020.609209
Keywords
altered herbicide translocation; herbicide metabolism; multiple-herbicide resistance; cross-herbicide resistance; ryegrass; Lolium rigidum Gaud; Lolium multiflorum (Lam; ); Lolium perenne (L; )
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The Lolium genus includes several important plants that are of particular interest to weed scientists due to their ability to thrive in both agricultural and non-agricultural environments, and have evolved resistance to multiple herbicide mechanisms. This review summarizes the current knowledge on non-target-site resistance in Lolium spp. to various herbicide mechanisms and suggests further research topics and strategies to enhance our understanding of resistance mechanisms.
The Lolium genus encompasses many species that colonize a variety of disturbed and non-disturbed environments. Lolium perenne L. spp. perenne, L. perenne L. spp. multiflorum, and L. rigidum are of particular interest to weed scientists because of their ability to thrive in agricultural and non-agricultural areas. Herbicides are the main tool to control these weeds; however, Lolium spp. populations have evolved multiple- and cross-resistance to at least 14 herbicide mechanisms of action in more than 21 countries, with reports of multiple herbicide resistance to at least seven mechanisms of action in a single population. In this review, we summarize what is currently known about non-target-site resistance in Lolium spp. to acetyl CoA carboxylase, acetohydroxyacid synthase, microtubule assembly, photosystem II, 5-enolpyruvylshikimate-3-phosphate synthase, glutamine synthetase, very-long chain fatty acids, and photosystem I inhibitors. We suggest research topics that need to be addressed, as well as strategies to further our knowledge and uncover the mechanisms of non-target-site resistance in Lolium spp.
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